diff --git a/src/interpret.c b/src/interpret.c
index 92ec6ee..1e12a83 100644
--- a/src/interpret.c
+++ b/src/interpret.c
@@ -15250,7 +15250,7 @@ again:
          * iteration.
          */
 
-        int vars_required;
+        //int vars_required;
         int nargs;
         p_int count, start;
         unsigned short offset;
@@ -15308,12 +15308,12 @@ again:
             if (count < 0 && !use_range)
                 ERRORF(("foreach() got a %"PRIdPINT", expected a non-negative "
                         "number.", count));
-            vars_required = 1;
+            //vars_required = 1;
         }
         else if (arg->type == T_STRING)
         {
             count = mstrsize(arg->u.str);
-            vars_required = 1;
+            //vars_required = 1;
 
             if (gen_refs)
             {
@@ -15342,7 +15342,7 @@ again:
         {
             check_for_destr(arg->u.vec);
             count = VEC_SIZE(arg->u.vec);
-            vars_required = 1;
+            //vars_required = 1;
 
             if (gen_refs)
             {
@@ -15361,7 +15361,7 @@ again:
         {
             struct_check_for_destr(arg->u.strct);
             count = struct_size(arg->u.strct);
-            vars_required = 1;
+            //vars_required = 1;
 
             if (gen_refs)
             {
@@ -15382,7 +15382,7 @@ again:
             vector_t  *indices;
 
             m = arg->u.map;
-            vars_required = 1 + m->num_values;
+            //vars_required = 1 + m->num_values;
             indices = m_indices(m);
 
             count = MAP_SIZE(m);
@@ -16719,7 +16719,9 @@ apply_low ( string_t *fun, object_t *ob, int num_arg
 
 {
     program_t *progp;
+#ifdef DEBUG
     struct control_stack *save_csp;
+#endif
     p_int ix;
 
     /* This object will now be used, and is thus a target for
@@ -16846,7 +16848,9 @@ retry_for_shadow:
             inter_sp = setup_new_frame2(funstart, inter_sp, allowRefs, MY_FALSE);
             previous_ob = current_object;
             current_object = ob;
+#ifdef DEBUG
             save_csp = csp;
+#endif
             eval_instruction(FUNCTION_CODE(funstart), inter_sp);
 #ifdef DEBUG
             if (save_csp-1 != csp)
@@ -16961,7 +16965,9 @@ retry_for_shadow:
                 inter_sp = setup_new_frame2(funstart, inter_sp, allowRefs, MY_FALSE);
                 previous_ob = current_object;
                 current_object = ob;
+#ifdef DEBUG
                 save_csp = csp;
+#endif
                 eval_instruction(FUNCTION_CODE(funstart), inter_sp);
 #ifdef DEBUG
                 if (save_csp-1 != csp)